Weighing-scale.



L. C. WETZEL.

WEIGHING SCALE.

APPHCATION FILED JUNE 2:,1907.

Patented Mar. 13, 1917.

1W Mw UNITED rs PAT FFKQE.

LEWIS C. WETZEL, OF TOLEDO, OHIO, AS$IGNOR, BY MESNE ASSIGNMENTS, TOTOLEDO SCALE COMPANY, OF NENARK, NEW JERSEY, A CORPORATION 03 NEWJERSEY.

WEIGHING-SCALE Application fiIed June 21, 1907.

To all whom it may concern:

Be it known that I, Lnwis C. VETZEL, a citizen of the United States,residing at Toledo, in the county of Lucas and State of Ohio, haveinvented certain new and useful Improvements in 1V eighing-Scales, ofwhich the followin is a specification.

The invention has reference more particularly to that type of weighingscales employing a dial and pointer for weight indicating purposes andone object of the invention is to so arrange the working parts of scalesof this type that they can be compactly arranged within a casing ofmoderate size at the same time being allowed a range of movementsuflicient to provide for all ordinary weighing operations. A furtherobject is to so arrange the working parts of the scales that friction isrendered practically negligible, this having reference more especiallyto thegearing directly associated with the pointer.

With these and incidental objects in view the invention consists in,certain novel features of construction and combinations of parts theessential elements whereof are recited in the appended claims and apreferred form of embodiment of which is described in detail hereinafterand illustrated in the accompanying drawings.

Of said drawings Figure 1 represents a front elevation of that portionof weighing scales of the type above indicated wherewith the presentinvention is concerned, the casing being partly broken away to discloseworking parts within; and Fig. 2 is a detail view of the pointergearing.

The reference numeral 2 designates an inclosing casing which maysurmount a column 3 rising from a platform (not shown). Within saidcasing at the lower part thereof there are arranged suitable bearings 3for a scale-beam l. The latter carries a clevis 5 on knife-edge bearingsto one side of its fulcrum P and said clevis may be connected by a rod 6with the weighing platform or other load-carryingmeans. A dash-pot 7 ispreferably arranged on the casing its piston connecting by a rod 8 withthe scale-beam for the purpose of steady ing the movements of thelatter. At an upper point within the casing suitable bearings 9 arearranged for supporting a pendulum 9. The latter is connected with oneSpecification of Letters Patent.

Patented Mar. 13, 1917.

Serial No. 380,126.

end of the scale-beam 4: in a well-known manner, the connectioncomprising a stirrup 1O engaged with the end of the scale beam beyondthe dash-pot, and a strap 11 connected with the stirrup and with thependulum, said strap overlying a shoe 12 pivotally mounted on thependulum hub and adjustably held fixed in a relation thereto by screws19/ in a well-known manner. It will be obvious that with the parts arrai'ed as above described the pendulum constitutes load counter-balancingmeans andthe scale-beam will be moved different distances by difierentweights affecting the connecting rod 6, as'regula-ted by the swing ofthe pendulum. The latter is provided ample space in which. to swing bythe manner of mounting it. The scale-beam occupies the lower part of thecasing extending from side to side thereof and the pendulum is locatedabove the scalebeam so as to swing from right to left as the parts areviewed in Fig. 1, 0., from that side of the casing where the stirrup 10is located toward the opposite side in weighing.

On the front of the casing at the upper part thereof a circular dial 13is carried and a pointer 11- is arranged-to sweep over this dial, saidpointer being carried by an arbor 15 supported by roller bearings 16 andsuitably confined in place by a fixed bracket 17.

The arbor 15 also carries a gear-wheel 18 and the latter is in mesh witha raclr 19 loosely confined by the bracket 17 as shown in 2. The rackextends horizontally as shown and it will be obvious that by moving thesame from side to side the pointer can be caused to sweep over the dial.

An upstanding arm 20 rigidly secured to the scale-beam 4.- at or nearthe latters fulcrum is pivotally connected at its upper end to said rackas shown at 21. It will thus be seen that as the scale beam swings upand down the rack will be moved horizontally. It is of the greatestimportance to accurate weighing that gearing such as the rack andgear-wheel described shall operate with perfect ease and it is thereforedesirable to keep the gearing in mesh under the lightest pressure. Itwill be noted that with the rack 19 pivotally connected to the upper endof the arm 20 and thence extending horizontally above the gear-wheel 18the weight of the rack will tend to keep it in mesh with the geanwheel.In order to rediiice the weight an amount just suflicient to maintainthe engagement and no more a counter-balancing weight 22 is mounted upona screw-threaded rod 28 projecting from the rack beyondits point ofattachment to the arm 20 c'. 0., on the side of the pivot opposite thatwhere the rack is engaged with the gear-wheel. By adjusting thiscoin1tci=balancing weight ust suiticient pressure and no more can be hadto preserve the (111 6; engagement between the rack and the gear-wheel.The bracket 1'? will prevent the rack from being jarred out of mesh withthe gear-wheel. ther counter-balancing weights employed are the onesdesignated Q-l; and 25, the former counterbalancing the scale-beam andthe latter counterbalancing the pendulum shoe 12.

While it is 'n-eferred to employ as load COUlltGl'dmldDClD 1 cans apendulum yet the invention is t necessarily limited to this character ofload counter-balancing means.

Tare can be conveniently provided for by extending the journal ofthe'scale-beam through the front of the casing and securing upon the ord of said journal, as by the screws 26, a tare-beam 27, practicallycoextensive with the scale-beam and carrying a sliding weight 28. Aspecial counterbalance for this tare-beam is preferably provided in theform of a weight 29, screwing onto an underhanging arm of an angularfixture 30 secured to the left-hand end of the beam.

l/Vhat I claim is:

1. In weighing scales, the combination of a horizontally disposed scalebeam having an upstanding arm rigid therewith, a dial,

a pointer therefor, a gear secured to the pointer to turn therewith, arack pivotally connected to the arm on the scale beam and resting uponand engaging the gear, the rack being without support other than saidarm and gear, a counterbalance for the rack to relieve the frictionthereof with the gear, and load-counterbalancing means connected withthe scale beam.

2. In weighing scales, the combination of a scale-beam, an upstandingarm rigid therewith, a counterbalanced rack pivotally connected withsaid arm and extending horizontally, a gear engaged by said rack, apointer turning with the gear, a dial for the pointer, andload-counterbalancing means connected with the scale-beam.

3. In weighing scales, the combination of a scale-beam, a load receiverconnected thereto, a pendulum connected to the beam on the same side ofthe fulcrum as the load receiver, an operating connection between thependulum and scale-beam, a dial, a

pointer, a gear turning with the latter, a horizontal rack engaging thegear, and an upstanding arm on the scale-beam coupled to said rack.

4L. In weighing scales, the combination of a scale-beam, a pendulum, anoperating connection between the pendulum and scalebeam, adial, apointer, a gear turning with the latter, a horizontal rack engaging thegear, counterbalancing means for said rack, and an upstanding arm on thescale-beam coupled to said rack.

5. In weighing scales, the combination of a dial, a pointer, a gearturning with the latter, a scalebeam having an upstanding arm, a rackpivotally connected with said arm and extending horizontally above thesaid gear in yielding engagement therewith with provisions for varyingthe degree of pressure, and load-counterbalanciug means connected withthe scale-beam.

6. In weighing scales, the combination of a dial, a pointer, a gearturning with the latter, a scale-beam having an upstanding arm, a rackpivotally connected with said arm and extending horizontally above thesaid gear in yielding engagement therewith, counterbalancing means forsaid rack, and load-counterbalancing means connected with thescale-beam.

T. In weighing scales, the combination of a dial, a pointer, a gearturning with the latter, a scale-beam having an upstanding arm, a rackpivotally connected with said arm and extending horizontally above thesaid gear in yielding engagement therewith, a counterbalancing weightadjustably mounted on said rack, and load-counterbalancing meansconnected with the scale-beam.

8. In weighing scales, the combination of an inclosing casing, a dial onthe front of the same, a pointer rotatively supported in the casing andextending over the dial, a gear wheel turning with the pointer, ahorizontally extending rack engaging the gearwheel, a, scale-beamfulcrumed in the casing and having an upstanding arm pivotally connectedwith said rack, a pendulum hung in the casing, and operating connectionsbetween the pendulum and the scale-beam.

9. In weighing scales, the combination of an inclosing casing, a dial onthe front of the same, a pointer rotatively supported in the casing andextending over the dial, a gear wheel. turning with the pointer, ahorizontally extending rack engaging the gearwheel, a scale-beamfulcrumed in the casing and having an upstanding arm pivotally connectedwith said rack, a pendulum hung in the casing, operating connectionsbetween the pendulum and the scale-beam, and a tare-beam secured tothescale-beam on the outer side of the casing.

10. In a weighing scale, a casing, a dial carried thereby, a rotatablepointer oooperating With the dial, a gear wheel turning with thepointer, a scale-beam fulcrumed be low the gear, a load-counterbalancingpendulum connected with the beam, connections from the beam to aload-receiver, an upstanding arm rigid with the beam and extendingupwardly to a position beside the gear, and a horizontal rack pivotallyconnected with said arm and meshing with the gear.

11. In a weighing scale, a casing having an opening, a main beam pivotedwithin the casing, means Within the casing for inclicating the extent ofmovement of said beam, a tare beam mounted on the main beam but outsidesaid casing, a connection between the main and tare beams substantiallyin line with the fulcrum of the main beam.

12. In a weighing scale, a casing, a main beam mounted within thecasing, an indicator within the casing connected to the main beam forindicating the extent of movement of the latter, load oifsetting meansmounted within the casing and connected to the main beam independentlyof the connection or" the indicating mechanism, a tare beam arranged infront of said casing and a connection from the tare beam to the mainbeam extending through the front wall of the casing.

13. In a weighing scale, the combination of adial, a pointer, a gearturning with the latter, a scale beam having oppositely extending arms,a rack connected with the scale beam on one of said arms and a loadreceiver and load counterbalancing pendulum connected to the other armof said scale beam.

14. In a weighing scale, a casing having an opening therein, indicatingmeans, a main scale beam mounted within the casing, a load-offsettingpendulum connected with the main beam adjacent one end thereof, aconnection for operating the indicating means connected with the scalebeam at a point distant from the connection with the load-oifsettingpendulum, a tare or auxiliary beam arranged outside of the casing, and aconnection from the tare beam to the main beam extending through theopening in the casing.

LEWIS C. WETZEL.

Witnesses:

M. L. THOMPSON, ALLEN DE VILBISS, Jr.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. O.

